Study type: Medical/biological study (experimental study)

Human exposure to a specific pulsed magnetic field: effects on thermal sensory and pain thresholds. med./bio.

Published in: Neurosci Lett 2004; 363 (2): 157-162

Aim of study (acc. to author)

To investigate the potential analgesic benefit of magnetic field exposure on sensory and pain thresholds following experimentally induced warm and hot sensations.

Endpoint

Exposure

Exposure Parameters
Exposure 1: 0–500 Hz
Modulation type: pulsed
Exposure duration: 30 min

Exposure 1

Main characteristics
Frequency 0–500 Hz
Type
Waveform
Exposure duration 30 min
Modulation
Modulation type pulsed
Exposure setup
Exposure source
Setup 3 pairs of nested Helmholtz coils ( 2 x 1 m; 1.751 x 0.875 m; 1.5 x 0.75 m)
Sham exposure A sham exposure was conducted.
Parameters
Measurand Value Type Method Mass Remarks
magnetic flux density 200 µT peak value - - -

Exposed system:

Methods Endpoint/measurement parameters/methodology

Investigated system:
Investigated organ system:
Time of investigation:
  • after exposure

Main outcome of study (acc. to author)

Data indicated that magnetic field exposure does not affect sensory thresholds. Pain thresholds were significantly increased following magnetic field exposure but not following sham exposure. A significant condition by gender interaction was observed for post-exposure pain thresholds. In conclusion, these results indicate that magnetic field exposure does not affect basic human perception, but can increase pain thresholds in a manner indicative of an analgesic response. The potential involvement of the placebo effect is discussed.

Study character:

Study funded by

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